He is a lot further along than this...
http://community.webshots.com/album/171469295iZRuYS
He is a lot further along than this...
What rear tyre is he going to use across those two bike rims welded together? It's going to be a monster.
This is what he wrote me some while back.
quote:
Reverse Trike design (two wheels front)
Base on a motorcycle Kawasaki Ninja ZX7R
Engine: 750cc ,128hp (race cam,jetting)
Dimension: Wheel base 90inch
Width: 78inch
Length:138inch
Height;ground to top 41inch
Ground clearance :4 to 5inch
Weight:800lbs
Front Wheel (2):205,40,16
Rear Wheel (1):Custom design 315,35,17 (modified motorcycle wheel)
Front suspension: Double wishbone , DOM tube , Tig Welded
Front hub: Modified mazda miata , 4 bolts Front spindle: Mazda miata Front
Hub hat: Custom design to fit motorcycle 11inch cross drilled disque Front
brake: 4 pistons motorcycle caliper , with balance valve Rear suspension:
modified motorcycle swing arm ,custom design Rear Brake 2 piston caliper
10inch rotor
Reversal gear box : custom reverse gearbox (made with VW transmission part)
Control: Howe clutch and brake pedal, CNC hydraulic Throttle, Custom pedal
box adjustable.
Steering: Removable steering wheel (wildwood)
Electronic: Custom design ECU , speedometer (converter from mechanical to
electronic pwm controller)
No ignition key , transponder design , with HONDA red start
engineand more ....
Frame: 1.5inch DOM round tube , 1inch square tube , tig and mig welded
Painting: Powder coating , suspension,frame 9I'm doing the powder coating)
Custom candy color for the fiberglass part.
Body part: Fiberglass , Kevlar laminated hood , Carbon fiber dash board and
side panel , air scoop.
Fiberglass rear module.
Equipment: Milling machine , Lathe , Mig,Tig,Stick welder,Powder
coating machine , and all the hand tools available
That's a proper job! I just love his rear wheel. That's how to get the traction down!
I wonder about his steering quickener though. There are several proprietry ones around that are both prettier and are adjustable for speed/ratio.
[Edited on 10/12/04 by ChrisS]
can some one post his web site i'm curious?
I love the concept of this layout of three-wheeler. It makes so much minimalist sense. I made a very crude trike once on this sort of layout and it suffered quite a bit from chassis twist, The rear wheel used to take on a noticable angle during cornering, and I wonder if this design might have some similar issues, which would be a real shame with all the flat rear rubber. The point is, that during hard cornering, the weight of the fuel tank and engine, above the single rear wheel, generates a lot of twist in the chassis that has to be accepted by the front axle. There is little triangulation in this chassis so far, that will provide torsional rigidity in an axial tension/compression manner. So, the torsional stiffness is only provided by the summation of the torsional stiffness of the several tubes joining front to rear. There are a lot of tubes, and I doubt that there will be a significant problem.. but a triangulated spine or similar would make it literally 100 times stiffer. Damn nice shape, and top markes for fabrication. Brian
Steve do you still have the website address. I would love to see this finished.
aside from the "looks cool" factor is there any reason to have a rear tire this wide. I understand that there is more traction needed because the 3 wheeler doesn't lean, heavier weight . It would seem that anything much wider then 205 or so is overkill. Very ingenious though.
Traction, track-tion, tracshun.
I wish I knew how this project has continued. I tried emailing Eric a while back, but it was returned as undeliverable. So Eric, if you ever read
this, email me!
Graber
This design suffers from a common problem. If the vehicle leans in a turn, which it will if the CG isabove ground, the big fat tire will also lean, lifting a corner slightly. Its traction will decrease since the tire is effectively becoming narrower, making it likely to spin. I don't know of a easy solution, and a leaning chassis isn't simple.
how about mounting your swingarm mounts (wouldn't work if you are using a sportbike frame) on a bushing, which would allow it to pivot a few degrees. I would think the chain drive could withstand the twist.
you'd also have to mount the shock on some type of rod end as well
quote:
Originally posted by tigris
how about mounting your swingarm mounts (wouldn't work if you are using a sportbike frame) on a bushing, which would allow it to pivot a few degrees. I would think the chain drive could withstand the twist.
I thought about mounting the swingarm axle mount to a bearing vertical on the chassis, allowing only for movement relative to that axis. That way the chain could not pull the sprocket towards it on acceleration-any comments?
although the output sprocket and the swingarm axle pivot would have to be close to each other or there would be pull with compression of the shock.